Strapping apparatus

ABSTRACT

A hopper is provided which is filled with a stack of paper bags or other material to be baled. The bags are transferred to a compression area where the stack is compressed. Straps are drawn about the stack and secured. The strapped bale is then discharged.

United States Patent Tull, m

[451 ct.3l, 1972 [$4] STRAPPING APPARATUS [72] Inventor: Herbert G.Tull, lll, Chatlottesville,

[73] Assignee: Hoerner Waldorf Corporation,

Ramsey, Minn.

[22] Filed: Sept. 21, 1970 [21] App]. No.: 73,967

[52] US. Cl. ..l00/28, 100/3, 100/4, 100/7, 100/26, 100/30, 100/32 [51]Int. Cl. .3651! 13/10 [58] Field of Search ..100/3, 4, 7, 27, 28, 30,32, 100/25, 26

[56] References Cited UNITED STATES PATENTS 2,262,232 11/1941 Harvey100/27 2,732,792 1/1956 White ..100/3 X 3,045,5 84 7/1962 Willis et al..100/27 3,126,686 3/1964 Kobylanski et a1. 100/27 X 3,359,023 12/1967Aubery....................100/27 X 3,368,590 2/ 1968 Welden "100128 X3,548,740 12/1970 Kobiella 100/28 Primary Examiner-Billy J. WilhiteAttorney-Robert M. Dunning ABSTRACT A hopper is provided which is filledwith a stack of paper bags or other material to be baled. The bags aretransferred to a compression area where the stack is compressed. Strapsare drawn about the stack and secured. The strapped bale is thendischarged.

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ATTORNEY

1. A baling apparatus for applying a flexible strap about a baleincluding: a platen, wall structures at opposite sides of said platen, acompression plate movable toward and away from said wall structure andforming a baling chamber when engaged with said wall structures, a chaintrack extending continuously through said wall structures, saidcompression plate, and said platen, a continuous slot communicating withsaid chain track and the inner surfaces of said baling chamber, a chainslideable in said chain track, a strap clamp adapted to engage the strapon one end of said chain overlying said slot, means engaging said chainto advance said one end of said chain through said track and about abale enclosed in said baling chamber, means engaging said chain toretract the chain, pulling said strap about the bale in said balingchamber.
 2. The structure of claim 1 and in which said slot is laterallyoffset from said chain track.
 3. The structure of claim 1 and includingstrap advancing means engageable with said strap to move the strap intoengagement with said strap clamp.
 4. The structure of claim 1 and inwhich the ends of said track overlap.
 5. The structure of claim 1 and inwhich one of said wall structures includes a movably supported sectionwhich is advanceable and retractable relative to the remainder of saidone wall structure, said movably supported section including a firstchain track section in which the chain is at all times engaged, and asecond chain track section in overlapping relation to said first chaintrack section, said first chain track section being aligned with thechain track in the remainder of said one wall structure, and said secondtrack section aligning with the chain track in said platen when saidmovably supported section is fully advanced.
 6. The structure of claim 5and in which said movably supported section is moved by movement of saidchain.
 7. The structure of claim 5 and including lock means on saidmovable section engageable with said chain to prevent relative movementbetween said chain and said movable section when said movable section isout of fully advanced position.
 8. The structure of claim 5 andincluding securing means supported adjacent to said movable section andsecuring overlapping portions of said strap together when said movablesection is in retracted position.
 9. The structure of claim 5 andincluding strap cutting means on said one wall structure adjacent tosaid movable section.
 10. The structure of claim 5 and including strapadvancing means on said one wall structure adapted to be engageable withthe end of said strap to advance said strap into said movable sectionwhen the same is in fully advanced position for engagement with saidclamp.
 11. An apparatus operable upon a length of flexible strap havinga free end and a supply end for forming a loop of strap about an objectcomprising: a frame including a chain track extending entirely aroundthe space within said frame, a chain slideable in said track having afree end normally in a starting position, said frame including a slotcommunicating with said track and communicating with the interior ofsaid frame, a strap clamp supported at the free end of said chain andoverlying said slot, means adapted to support the free end of the tapein the path of movement of said strap clamp after said free end of saidchain has traveled about said track and, means for driving the free endof said chain and said strap clamp about said track, and for reversingthe movement of said free end of said chain and said strap clamp andadapted to draw the strap about said object upon movement of said freeend of said chain to said strarting position.
 12. The structure of claim11 and in which said strap clamp includes a fixed jaw and a movable jawbetween which said free end of said strap is adapted to engage.
 13. Thestructure of claim 11 and in which the clamp comprises a bifurcated endincluding a trapezoidal slot with the narrow end of the slot at the endof the clamp and into which said strap is adapted to extend, and a wedgeshaped jaw slidable along one side of said slot.
 14. The structure ofclaim 13 and in which the other side of the slot and the adjoining sideof the jaw are provided with toothed surfaces.
 15. The structure ofclaim 11 in which said means for driving said chain includes a sprocket,and means for selectively rotating said sprocket in either direction.16. The structure of claim 15 and in which said means for driving saidchain includes a gear mounted for rotation with said sprocket, and agear rack engaging said gear for rotating the same.
 17. The structure ofclaim 16 and including a piston and cylinder device engaged with saidrack to actuate the same.
 18. The structure of claim 11 and in whichsaid track includes overlapping end portions.
 19. The structure of claim18 and in which the end of the track at which said means adapted tosupport the free end of the the tape is located is inwardly of the endof the track to which said strap clamp is retracted when in saidstarting position.
 20. The structure of claim 18 and including meansadapted for securing the overlapping ends of the tape together.